Microdisplays are used in various optical devices such as headsets, viewfinders and helmet-mounted
displays. The use of organic light emitting diodes (OLEDs) in a microdisplay on silicone substrate
provides the opportunity of lower power consumption and higher optical performance compared to
other near-to-eye display technologies.
Highly efficient, low-voltage, top emitting OLEDs are well suitable for the integration into a CMOSprocess.
By reducing the operating voltage for the OLEDs below 5V, the costs for the CMOS process
can be reduced significantly, because a standard process without high-voltage option can be used.
Various OLED stacks on silicone substrate are presented, suitable for full colour (RGB) applications.
Red and green emitting phosphorescent OLEDs and blue emitting fluorescent OLEDs all with doped
charge transport layers were prepared on a two metal layer CMOS test substrate without active
transistor area. Afterwards, the different test displays were measured and compared with respect to their
performance (current, luminance, voltage, luminance dependence on viewing angle, optical outcoupling